A mother who allegedly shot her two daughters to death was killed by police, authorities say. (Credit: KTRK via CNN)

FULSHEAR, Texas — A woman in Texas shot her two teenage daughters — killing both of them — before a responding police officer shot and killed the mother, authorities said.

The woman shot her 19- and 17-year-old daughters late Friday afternoon in the Westheimer Lakes-North neighborhood near the Houston suburbs of Fulshear and Katy, the Fort Bend County Sheriff’s Office said.

After someone called 911, a Fulshear police officer shot the mother when she refused to put down her weapon, the sheriff’s office said.

The daughters were found on the street with gunshot wounds. The 19-year-old died at the scene; the 17-year-old died at a hospital, the sheriff’s office said.